Hand-operated threading-die.



H. L. FISHER.

HAND OPERATED THREADING DIE.

APPLICATION men Ammo". 1912.

1,142,41 1 Patented June 8, 1915.

WITNESS S d I INVENTOR rah-9,44 BM-Q4525, A7 w HENRY I1. FISHER, 0FWAYNESBORO, PENNSYLVANIA, ASSIGNOR TO LANDIS MACHINE COMPANY, OFWAYNESBORO, PENNSYLVANIA, A CORPORATION.

HAND-OPERATED THREADING-DIE.

Specification of Letters Patent.

Patented June 8, 1915.

Application filed August 20, 1912. Serial No. 716,093.

hand tools as well as other advantages, allas will'be hereinafter morefully described and claimed.

Referring to the accompanying drawings, which are made a part hereof andon which similar reference characters indicate slmilar parts, Figure 1is a face elevation of one of my improved cutter heads as adjusted foruse, Fig. 2 a sectional view on the dotted line 22 in Fig. 1, Fig. 3 asectional view on the dotted line 3-3 in Fig. 1, Fig. 4 a detail sectionon the dotted line 44 in Fig. 1, and Fig. 5 a view similar to.a portionof Fig. 2 illustrating a modified construction.

In said drawings the portions marked A represent the frame in which thecutter head proper is mounted, B the body of said cutter head, and C thecutters or chasers.

The frame A comprises a central ring of appropriate form and sufficientstrengthfor the purpose, having handles a projecting from diametricallyopposite sides thereof by which the tool may be turned. Said handles areshown broken off in Fig. 1 but in the tool will be extended to thelength appropriate for she purpose, as will be readily understoo Thebody B of the die is of cylindrical form, its periphery being turned toseat snugly in the frame A in which it is secured by a clamping screw10, the conical point of which is adapted to seat in a conical socket 11in the periphery of said body. From the front face of said body branchesor arnfs 7) project outward a distance so that their outer ends will besomewhat beyond the outside edge of chasers C. The faces of said armsare formed concave and their extreme ,outer ends 13 are flared outwardslightly to facilitate centering the tool on the work. From said taperedfaces 13 said arms are formed with grooves corresponding to the cuttinggrooves in the chasers G which serve as means for leading the work intothe die, or the die onto the work. Said grooves extend not only thelength of the arms I) but also for a distance into the body B, orthrough that portion of the body which cor responds in size to the sizeof the work. As shown, there are two of said arms I) extending beyondthe edges of chasers C, and a third arm 6 which does not extendto thecutting edge of said chasers, but projects nearly to said cutting edge,its face being formed correspondingly to the faces of the arm 6. Adiametrical slot .9 extends through body A from one side to-near theother side and the .machine screw 14 extends through a radiallyprojecting arm 6 on one side thereof and engages with screw threads inthe base of the adjacent arm I) thus providing a means for slightlyadjusting the size of the into the die are formed in a separate sleeve13 secured in position by means of a set screw 15. Such a constructionwill be found desirable where a single body is desired for use to outwork of various sizes. As will be seen, by removing one sleeve 6 of onesize and inserting anothersleeve of a differentsize the tool will beadapted for different sizes of work and as many sleeves of varying sizesas desired may be provided for each body.

Outwardly projecting arms 16 are'formed on the front face of body Badapted to serve as cutter holders for the cutters C. Said said recessesand their outer edges are formed with a out under shoulder 17 with whicha clamping plate 18, similarly formed,

engages.

the cutter firmly against the seat at. the inner edge of the recess, butalso draws it back tightly and secures it rigidly upon the bottom ofsaid recess. .Screws c are mounted in screw-threaded perforations in thecorners of the cutter holders and bear upon the cutters C for thepurpose of adjusting them longitudinally and securing them in adjustedpositions. By this construction of cutter head, as will be readily seen,the cutters C are mounted and extend tangentially with the work, andbeing formed with cutting grooves in their faces extending from end toend thereof are. adapted to be fed to the work'by the screws 0 as theywear away, thus providing a tool of long life and securing to the handtool the well known advantages of this character of a cutterheretofore-used in machines. i

' Having thusfully described my said invention What ll claim as new anddesire to secure by Letters Patent is:

1. A cutter-head comprising a frame having handles extending outwardlytherefrom, a die body mounted in said frame formed with arms extendingoutwardly from its face to a point beyond the cutters and tapered attheir outer ends to center on the work, said arms being formed withthreads or grooves in their faces to serve as means for leading theworkinto the die, and tan gential cutters mounted on the face of saidpower driven screw cutting body with their cutting ends adjacent to thegrooves in said arms, substantially as set forth.

Ahand-operated threading die comprising a frame with operating handles,a die body secured therein, cutters carried on the face of said die bodyextending tangenscrews 19- extend 3. A hand-operated threading diecomprising a frame having operating handles, a die body mounted in saidframe and formed with a diametrical slot, meansfor contracting orexpanding said slot, cutters mounted on the face of said body extendingtangentially to the work, arms projecting from the face of said bodytoobeyond the outer edges of said cutters and formed with concave facesgrooved to correspond with the grooves in said cutters, and means forclamping and adjusting said cutters in position, substantially as setforth.

4:. A hand-operated threading die comprising a frame, a body secured insaid frame, tangential cutters mounted on said body, projecting arms onthe face of said body formed with threads for leading the work into saidbody, said threads continuing for a distance within saidbody,"substantially as set forth.

5. A hand operated threadingdie comprising a frame, a die body thereinformed with a central screw-threaded aperture and with membersprojecting forward from the outer face of said body with their inneredges in line with said aperture, and with threads in said edges whichare a continuation of the threads in said aperture, and cutters securedtangentially to the work on said body between the adjacent edges of saidprojecting members, whereby the work is received, guided, and supportedby said members during the operation of threading, substantially as setforth.

In witness whereof, I have. hereunto set my hand and seal atVVaynesboro, Pennsylvania this 17th day of August, A. D. nineteenhundred and twelve.

I HENRY L. FISHER. [Ls] Witnesses:

JOHN Gr/BENEDICT, IRA D. GROVE.

